Reasons Your Fiat 500 Key Fob Won't Work

A key fob for the Fiat 500 is a great way to unlock the doors and get started the car. However, there are many reasons the fob could stop functioning. It could be due to a dead battery damage to the receiver module, issues, and interference.

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Dead Coin Battery

The most common reason your 500 key fob will not function is due to the battery is dead. Modern key fobs have limited operating range and must be within just a few inches of the vehicle to function. If you're far from your vehicle and press the keyfob button it will not respond, and display the message "Key Fob Not Detected".

If this happens you need to replace the battery of your coin-cell (Part Number CR2032) with a new battery of a reputable brand like Panasonic Duracell or Energizer. You can find them in your local hardware store, or online.

You can test the battery on your coin-cell by pressing the buttons while you're standing close to your Fiat 500. The car should flash its parking lights, and the key fob should work the lock and unlock switches.

If your key fob still isn't working even after replacing the battery, it could be water damage that prevents it from communicating with the module in your vehicle. Water damage can happen in a number of ways, from small splashes to submerging your fob in salt water at the beach. If you suspect that your fob was exposed to water, put it in a rice bag to draw out the moisture. If this doesn't work your fob may need to be reset by an experienced auto locksmith or the dealer.

Water Damage

Water damage can occur when you immerse the fob in the ocean, or wash it in a washer. Saltwater can cause the circuit board to short, and eventually end up dying. It's not good to soak the fob in water however, but don't give it up when you accidentally drop it in water or forget to remove it from your pocket.

First, remove the battery from the fob. Before replacing the battery, clean the electronic chip with isopropyl or similar products. Then, test the fob to check if it functions. If the fob doesn't work then it might need to be reprogrammed. This is usually done by an auto locksmith or dealer.

If your key is older and is not programmed for your car You will need to replace it completely. This is an easy process which can be accomplished by a professional locksmith for automotive use. The locksmith will need the key cut to match your vehicle's ignition. They'll also need to reprogram the fob for your vehicle's system. This is a cheap and quick process that could be completed within the same day.

Receiver Module Issues

One of the most common reasons your 500 key fob may stop working is that it's simply out of range. The remote has a maximum range of 30 feet, which means when you're too far from your vehicle it will not respond to your commands. It can be solved by moving closer to your vehicle until it starts responding.

If you've replaced the battery on your coin (commonly known as"button" or "button" or "watch") and your fob still won't work it could be due to an internal circuit board issue. In most cases, reprogramming the fob will fix the issue. You can find the instructions on how to do this for all automobiles by searching YouTube or reading the owner's manual.

It is possible to replace the metal clips that hold the battery of your coin in place. If they lose tension, it can stop your coin battery from being properly seated, causing your remote to malfunction.

In rare instances, the fob can become out of the vehicle's sync because of hardware or software issues. You can fix this problem by visiting your local dealer or auto-locksmith to reprogram your key fob. In certain instances it is possible that the software will need to be reinstalled in your body control modules.

Interference

Interference can also cause the key fob to not receive or transmit signals. This could occur if the keyfob's location is in close proximity to a radio transmitter like a cellphone or radar detector. Other reasons why the key fob might not function include a poor connection to the buttons and internal chip, or water damage.

If your key fob suddenly stopped working, or if you have tried everything at home to fix it (e.g. replacing the battery, reprogramming it and using the spare key fob, you could have a faulty receiver module on your 500. The receiver module is situated under the dash and receives the radio frequency signals from the key fob. It converts them to electronic commands that the vehicle interprets.

There's a quick and easy way to reset the 500's internal system, including the keyfob. Disconnect the battery for 15 minutes by taking off first the negative cable, then the positive cable. Then, reconnect the battery. This will remove any residual electricity and restart the car's computer system, which can help you the key for fiat 500 fob to function again. If the issue continues it is recommended that you consult an expert certified technician. They will be able to diagnose the exact cause of your problem.